A shy bank employee unexpectedly invites a young woman to a café, leading to a one-night stand. When he shares this with his disillusioned friend, the writer helps him navigate a dazzling social ascent.

Paris, France, during the First World War. While thousands of soldiers die every day on the battlefields, Henri Landru, a seemingly respectable furniture dealer, married and father of four children, relentlessly feeds his own sinister factory of death.

Having recently moved into her new apartment, Irène Cazenave, the widow of a well-known police officer, is forced by one of her husband's colleagues to take part in an investigation. The building's provocative concierge has been found murdered. We watch a parade of suspects, only to learn at the end that Irène killed the janitor under blackmail. She kills herself.